12763865416 has 8 divisors (see below), whose sum is σ = 23932247670. Its totient is φ = 6381932704.

The previous prime is 12763865399. The next prime is 12763865417. The reversal of 12763865416 is 61456836721.

It can be written as a sum of positive squares in only one way, i.e., 8699292900 + 4064572516 = 93270^2 + 63754^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 12763865416.

It is not an unprimeable number, because it can be changed into a prime (12763865417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 797741581 + ... + 797741596.

Almost surely, 2^12763865416 is an apocalyptic number.

It is an amenable number.

12763865416 is a deficient number, since it is larger than the sum of its proper divisors (11168382254).

12763865416 is a wasteful number, since it uses less digits than its factorization.

12763865416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595483183 (or 1595483179 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 49.

The spelling of 12763865416 in words is "twelve billion, seven hundred sixty-three million, eight hundred sixty-five thousand, four hundred sixteen".